diff --git a/functions/array.xml b/functions/array.xml
index 715cc60a79..8822f7266f 100644
--- a/functions/array.xml
+++ b/functions/array.xml
@@ -259,10 +259,13 @@ array_keys ($array, "blue");  //  returns array (0, 3, 4)
 		PHP3 users
 	   </title>
 	   <programlisting role="php">
-function array_keys($arr) {
+function array_keys($arr, $term="") {
 	$t = array();
-	while (list($k,$v) = each($arr))
+	while (list($k,$v) = each($arr)) {
+		if ($term &amp;&amp; $k != $term)
+			continue;
 		$t[] = $k;
+	}
 	return $t;
 }
 	   </programlisting>